SpringBoot 配置全局异常处理器捕获异常

阳光穿透心脏的1/2处 2022-09-11 03:26 177阅读 0赞

最近看到项目中有满屏的try catch，每个接口都做了 try/catch 处理，而且一旦需要调整，所有的接口都需要修改一遍，非常不利于代码的维护，然后就想着配置一下全局异常处理器。

##  全局异常处理 ##

1.配置一下异常类

public class UserNotExitException extends Exception{
    
        private static final long serialVersionUID = 1L;
    
        private String errorCode;
    
        public UserNotExitException(String errorCode) {
            this(errorCode, "");
        }
    
        public UserNotExitException(String errorCode, String message) {
            super("errorCode: " + errorCode + ", message: " + message);
            this.errorCode = errorCode;
        }
    
        public String getErrorCode() {
            return this.errorCode;
        }
    }

2.全局异常拦截器添加自定义异常类

@RestControllerAdvice
    public class GlobalExceptionHandler {
        @ExceptionHandler(UserNotExitException.class)
        public ResultInfo handleValidationException(UserNotExitException e) {
            return new ResultInfo(5000, e.getMessage());
        }
        @ExceptionHandler(DuplicateKeyException.class)
        public ResultInfo handlerDuplicateKeyException(DuplicateKeyException e) {
            return new ResultInfo(1000,e.getMessage());
        }
    }

3.controller测试

@RestController
    @RequestMapping("user")
    public class DemoController {
        @GetMapping("/testException")
        public Integer testException(Integer a,Integer b) throws UserNotExitException {
            if(b==null){
                throw new UserNotExitException("1000","失败");
            }
            return a+b;
        }
    
        @GetMapping("/getUser")
        public boolean getUser() throws Exception {
            throw new UserNotExitException("5000","请求用户失败");
        }

4.返回值类

@Data
    public class ResultInfo {
        public final static String FAILED = "1001";
    
        private Integer code;
        private String message;
    
        public ResultInfo(Integer code, String message) {
            this.code = code;
            this.message = message;
        }
    
    }

5.postman测试结果

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA54aZ54aZ5bCP5a2m5aeQ_size_20_color_FFFFFF_t_70_g_se_x_16][]

6.项目结构

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA54aZ54aZ5bCP5a2m5aeQ_size_20_color_FFFFFF_t_70_g_se_x_16 1][]

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[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA54aZ54aZ5bCP5a2m5aeQ_size_20_color_FFFFFF_t_70_g_se_x_16 1]: /images/20220828/640f331feef14e3e8a4c437d0e718044.png